1921037 has 2 divisors, whose sum is σ = 1921038. Its totient is φ = 1921036.

The previous prime is 1921027. The next prime is 1921063. The reversal of 1921037 is 7301291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1196836 + 724201 = 1094^2 + 851^2 .

It is an emirp because it is prime and its reverse (7301291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1921037 - 2⁴ = 1921021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1921027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960518 + 960519.

It is an arithmetic number, because the mean of its divisors is an integer number (960519).

2^1921037 is an apocalyptic number.

It is an amenable number.

1921037 is a deficient number, since it is larger than the sum of its proper divisors (1).

1921037 is an equidigital number, since it uses as much as digits as its factorization.

1921037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 1921037 is about 1386.0147906859. The cubic root of 1921037 is about 124.3116726005.

The spelling of 1921037 in words is "one million, nine hundred twenty-one thousand, thirty-seven".